Answer:
x=5/2
Step-by-step explanation:
4x-2=2x+3
1) Add 2 to both sides:
4x=2x+5
2) Subtract 2x from both sides:
2x=5
3) Divide both sides by 2:
x=5/2
The answer is 9 sorry if this is wrong
Answer:
A. 15, 20, and 25
Step-by-step explanation:
Note that 3-4-5 is a pythagorean triple via following:
Dividing 15, 20, and 25 by 5 nets you the pythagorean triple 3-4-5.
For this case we can make the following rule of three:
21 ------> 70%
x --------> 100%
Clearing x we have:
x = (100/70) * (21)
Rewriting we have:
x = (10/7) * (21)
x = 30
Thus,
21 is 70% of 30
Answer:
21 is 70% of 30
Answer:
D
Step-by-step explanation:
